Image Formation by Plane Mirrors

Q.

A man is running towards a plane mirror at the rate of $2m/s$. With what speed is he approaching his own image?

Q.

Real images are always___________ and virtual images are always________.

Q. The area illuminated during diffused reflection is _______ regular reflection by a plane surface. Assume parallel beam of incident light is used.

1. brighter than
2. larger than
3. same as
4. smaller than

Q.

An object O is kept 80 cm in front of a plane mirror M. If the mirror is moved 20 cm away from the object. Calculate the image shift from its previous position. [2 Mark]

Q. If an object moves at a speed of $10m{s}^{-1}$ towards a plane mirror. Find out the speed of the image and its direction?

1. $2m{s}^{-1}$, away from mirror
2. $5m{s}^{-1}$, towards the mirror
3. $10m{s}^{-1}$, towards the mirror
4. $10m{s}^{-1}$, away from mirror

Q.

Once I suddenly woke up in bed and, by mistake, saw the image of my clock in a plane mirror and panicked that I was late. The time it showed was8:45. (The clock did not have numbers on it). The correct time was -

1. 2:45

2. 3:45

3. 4:15

4. 3:15

Q. The number of images formed by two plane mirrors inclined at an angle ${60}^{\circ }$ of an object placed symmetrically between mirrors is

1. 5
2. infinite
3. 6
4. 7

Q. What kind of image do we see while watching a movie in a cinema hall?

1. Inverted
2. Real
3. Virtual
4. Laterally inverted

Q. Which of the following mirrors is used to make periscope?

1. Convex mirror
2. Concave mirror
3. Plane mirror
4. Cylinderical mirror

Q.

A plane mirror and an object approach each other with speeds of $5m{s}^{-1}$ and $10m{s}^{-1}$ respectively. What will be the speed of the image w.r.t. the stationary observer?

1. 5 $m{s}^{-1}$

2. 15 $m{s}^{-1}$

3. 20 $m{s}^{-1}$

4. 25 $m{s}^{-1}$

Q. An image formed by the plane mirror is ___.

1. erect
2. inverted
3. magnified
4. diminished

Q.

A boy is observing his image in a plane mirror. The distance between the mirror and his image is 6 $m$. If he moves 2 $m$ towards the mirror, then the distance between the boy and his image will be:

1. 8 $m$

2. 6 $m$

3. 4 $m$

4. 2 $m$